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Date:      Sun, 23 Apr 2006 16:17:32 -0400
From:      Kris Kennaway <kris@obsecurity.org>
To:        Dmitry Morozovsky <marck@rinet.ru>
Cc:        stable@FreeBSD.org
Subject:   Re: fsck_ufs locked in snaplk
Message-ID:  <20060423201732.GA74905@xor.obsecurity.org>
In-Reply-To: <20060423193208.N1187@woozle.rinet.ru>
References:  <20060423193208.N1187@woozle.rinet.ru>

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On Sun, Apr 23, 2006 at 07:35:37PM +0400, Dmitry Morozovsky wrote:
> Colleagues,
>=20
> one of my servers had to be rebooted uncleanly and then I have background=
ed=20
> fsck locked for more than an our in snaplk:
>=20
> 742 root         1  -4    4  1320K   688K snaplk   0:02  0.00% fsck_ufs
>=20
> File system in question is 200G gmirror on SATA. Usually making a snapsho=
t=20
> (e.g., for making dumps) consumes 3-4 minutes for that fs, so it seems to=
 me=20
> that filesystem is in a deadlock.

Is the process performing I/O?  Background fsck deliberately runs at a
slow rate so it does not destroy I/O performance on the rest of the
system.

Kris

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